soapbark

soapbark

[sohp-bahrk]
noun
1.
a Chilean tree, Quillaja saponaria, of the rose family, having evergreen leaves and small, white flowers.
2.
the inner bark of this tree, used as a substitute for soap.

Origin:
1860–65; soap + bark2

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World English Dictionary
soapbark (ˈsəʊpˌbɑːk)
 
n
1.  Also called: quillai a W South American rosaceous tree, Quillaja saponaria, with undivided evergreen leaves and small white flowers
2.  Also called: quillai bark the inner bark of this tree, formerly used as soap and as a source of saponin
3.  any of several trees or shrubs that have a bark similar to this

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